171215 has 12 divisors (see below), whose sum is σ = 226632. Its totient is φ = 124080.

The previous prime is 171203. The next prime is 171233. The reversal of 171215 is 512171.

It is not a de Polignac number, because 171215 - 2¹² = 167119 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 171193 and 171202.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 464 + ... + 746.

It is an arithmetic number, because the mean of its divisors is an integer number (18886).

2¹⁷¹²¹⁵ is an apocalyptic number.

171215 is a deficient number, since it is larger than the sum of its proper divisors (55417).

171215 is a wasteful number, since it uses less digits than its factorization.

171215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310 (or 299 counting only the distinct ones).

The product of its digits is 70, while the sum is 17.

The square root of 171215 is about 413.7813432237. The cubic root of 171215 is about 55.5282436123.

Adding to 171215 its reverse (512171), we get a palindrome (683386).

The spelling of 171215 in words is "one hundred seventy-one thousand, two hundred fifteen".